Replace PruneAllButActive with PruneAllButVisible.

chrome/browser/prerender/prerender_browsertest.cc

Index: chrome/browser/prerender/prerender_browsertest.cc
diff --git a/chrome/browser/prerender/prerender_browsertest.cc b/chrome/browser/prerender/prerender_browsertest.cc
index 2c85c34017dc8b942079e478033d8fbde1f0f1fc..2d93501df964951d14b4ec62f2dd3c9035fe8633 100644
--- a/chrome/browser/prerender/prerender_browsertest.cc
+++ b/chrome/browser/prerender/prerender_browsertest.cc
@@ -1365,14 +1365,23 @@ IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderVisibility) {
   NavigateToDestURL();
 }
 
-// Checks that the visibility API works when the prerender is quickly opened
-// in a new tab before it stops loading.
-IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderVisibilityQuickSwitch) {
-  PrerenderTestURL("files/prerender/prerender_visibility_quick.html",
-                   FINAL_STATUS_USED, 0);
-  NavigateToDestURL();
+// Checks that the prerendering of a page is canceled correctly when it is
+// quickly opened in a new tab before it stops loading.
+IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderQuickSwitch) {
+  PrerenderTestURL("files/prerender/prerender_page.html",
+                   FINAL_STATUS_CANCELLED, 0);
+  // Post a task to cancel all the prerenders.
+  MessageLoop::current()->PostTask(
+      FROM_HERE, base::Bind(&CancelAllPrerenders, GetPrerenderManager()));
+  content::RunMessageLoop();
+  EXPECT_TRUE(GetPrerenderContents() == NULL);
 }
 
+// TODO(creis): Test for 234809, perhaps as a unittest.  Commit one URL in
+// prerender WebContents, then start a pending navigation.  Swap it in, then
+// commit the pending navigation.  Crashes before this CL, should work now.
+// Not sure how to write the test, though.
+
 // Checks that the prerendering of a page is canceled correctly when a
 // Javascript alert is called.
 IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderAlertBeforeOnload) {